# include <bits/stdc++.h>
using namespace std;
int k;
double a, b, c, d, x;
inline double f(double x) {
	return ((a * x + b) * x + c) * x + d;
}
int main() {
	cin >> a >> b >> c >> d;
	for(int k = -10000; k <= 10000; k++) {
		x = (double) k / 100;
		if(f(x - 0.005) * f(x + 0.005) < 0 || f(x - 0.005) == 0) 
			printf("%.2lf ", x);
	}
}
